if f(x) = 3x - 4, then evaluate f(a-7).

please help me.

Answer:

z=1.6 y=3.9 x=0.6

Step-by-step explanation:

Answer:

A. In order for DeMarco to know if the value is a solution of the equation, he will need to multiply both sides by 2 which will make the equation 2×(1/2x)=(2)×*4)

B. Yes, x=8

Answer:

x < 7

Step-by-step explanation:

-8x + 40 > -16

-8x > -16 - 40

x < -56/-8

x < 7

(when changing sides of neg. multipliers, you need to change the sign side, dont fall for that common mistake)

Answer:

x < 7

Step-by-step explanation:

-8x + 40 > -16 (subtract 40 on both sides)

-8x > -56 (divide by -8) - be careful and don't forget to flip the sign when dividing by a negative number

x < 7 (final answer)

Answer:

[tex]4<QR<14[/tex]

5, 6, 7, 8, 9, 10, 11, 12, and 13.

Step-by-step explanation:

We can use the triangle inequality. By the triangle inequality, the sum of any two sides of a triangle must be greater than the remaining side.

In other words, the sum of the two shorter sides must be greater than the longest side.

We know that PQ is 5 and PR is 9.

For the first case, let's say that neither PQ nor PR is the longest side. Instead, QR is the longest side. Then their sum must be greater than QR. Thus:

[tex]5+9>QR\Rightarrow QR<14[/tex]

However, for the second case, let's say that QR is not the longest side. In this case, PR will be the longest side. Therefore, QR plus PQ must be greater than PR:

[tex]QR+5>9\Rightarrow QR>4[/tex]

Thus, we have a compound inequality:

[tex]4<QR<14[/tex]

Therefore, the possible whole-number lengths of QR are:

5, 6, 7, 8, 9, 10, 11, 12, and 13.

Answer:

d = √(x2-x1)²+(y2-y1)²

Step-by-step explanation:

ans is 5√65 units

Step-by-step explanation:

for the given value x = -2

= 3(2x-4) + x^2 +5

= 3(-4 -4) +4+5

= -24+9

= -15

Answer:

The function, h(x) = x³ - 2x² - 4x + 5 has 2 or 0 positive real zeros and exactly 1 negative real zero.

Step-by-step explanation:

Using Descartes' Rule of Signs

For the positive-root case, the sign on x is not changed:

h(x) = x³ - 2x² - 4x + 5

Counting the number of sign changes while ignoring the actual coefficients; there are two sign changes.

Thus, the function, h(x) has 2 or 0 positive real zeros

For the negative root case, h(-x), that is changing the sign on x

h(-x) = (-x)³ - 2(-x)² - 4(-x) + 5

h(-x) = -x³ - 2x² + 4x + 5

Counting the number of sign changes while ignoring the actual coefficients; there is only one sign change.

Thus, the function, h(x) has exactly 1 negative real zero.

Answer:

Part A: D

Step-by-step explanation:

Ok Let's assume you are right and the diagonal is 8x. If that is true, one of the answers will work.

Part A

It's the wrong answer. The answer is yes. Use a^2 + b^2 = c^It's the wrong answer. The answer is yes. Use a^2 + b^2 = c^It's the wrong answer. The answer is yes. Use a^2 + b^2 = c^2

givens

diagonal = 8x

one of the legs = 2x.

other leg = ?

Formula

a^2 + b^2 = c^2

(2x)^2 + b^2 = (8x^2)                    Expand the brackets

4x^2 + b^2 = 64x^2                      Subtract 4x^2 from both sides.

b^2 = 64x^2 - 4x^2

b^2 = 60x^2

The prime factors of 60 are 2 * 2 * 3 * 5    

You can't do much with the 3 and 5 so leave them under the root sign.

x^2 = x * x

What you get is

b^2 = √3 * 5 * 2* 2 * x * x

The factors come in pairs. One of the pairs goes outs the root. The other one is thrown away.

b = 2*x * √15

So the answer to part A is D

Part B

x = 3

The missing side = 2 * 3 * √15

The missing side = 6√15

The missing side = 23.2

Root 15 = 3.87

Answer:

A. 33.3%

Step-by-step explanation:

On a dice, we have the numbers 1, 2, 3, 4, 5, and 6. The question is asking for the probability of anything greater than 4. This means we're trying to find the probability of rolling a 5 or a 6 since those are the only numbers greater than 4 on a dice. We can write this as a fraction.

There are six numbers total, so that will be the bottom of our fraction. We have two numbers that are greater than 4. This means we will write our fraction like so:

[tex]\frac{2}{6}[/tex]

Next, we can simplify the fraction by 2, leaving us with 1 over 3, like this:

[tex]\frac{2}{6} = \frac{1}{3}[/tex]

Finally, just divide the 1 by 3 to get 0.333, or 33.3% when you move the decimal two places to the right. Hope this helps!

Answer:250

Step-by-step explanation:

Answer:

b = 12.6

Step-by-step explanation:

a*2 + b*2 = c*2

6*2 + b*2 = 14*2

36 + b*2 = 196

Subtract 36 from both sides

36 + b*2 = 196

-36             -36

b*2 = 160

Find the square root of both

b = 12.64911064  or 12.6

Answer:

19/5 = 3 4/5 soils for each flower bed.

Step-by-step explanation:

Answer is 3 4/5 soils  in each flower bed.

Answer:

7 million

Step-by-step explanation:

If you use your finger and continue the graph you will get to 7.\.

Answer:

7 million

Step-by-step explanation:

Take 2 points of the graph

(3,3) and (6,4)

the numbers on the x axis are 3 and 6

the numbers on the y axis are 3 and 4

Everytime the x axis goes up by 3, the y axis goes up by 1

Therefore, the slope is [tex]\frac{1}{3}[/tex]

If you continue the slope, you would get (12,6) and then (15,7)

Answer:

1/5

0.2

Step-by-step explanation:

hope it helped:)))))))())

Answer: Fraction form: 2/10 Decimal: 0.20

Step-by-step explanation:

20/100 divided by 10 is equal to 2/10. Have a nice day :)

Answer:

B. x-5

Step-by-step explanation:

Sister's height: x

Gavin's height: 5 in. less than his sister's height.

Answer:

 =  5

Step-by-step explanation:

Answer:

Divide the rectangle's area by 4 to get the area of one triangle

Step-by-step explanation:

The area of one triangle is one-quarter area of the rectangle.

We need to find the area of the triangle.

Since we have a rectangle, and there are 4 triangles in the rectangle. Also, each triangle is the same size.

Let

So, area of rectangle, A = area of 4 triangles

= 4 × area of one triangle, A'

= 4A'

A = 4A'

Making A' subject of the formula, we have

A' = A/4

So, the area of one triangle is one-quarter area of the rectangle.

Learn more about area of a triangle here:

https://brainly.com/question/27436493

#SPJ9

9514 1404 393

Answer:

  4/9

Step-by-step explanation:

The average rate of change is the slope between the two points.

  m = (y2 -y1)/(x2 -x1) = (12 -8)/(13 -4) = 4/9

The average rate of change on the interval [4, 13] is 4/9.

Answer:

A. 1/3

Guaranteed!

Answer:

$25.76

Step-by-step explanation:

$1.12×23ft=$25.76

Answer:

20

Step-by-step explanation:

Answer:

I would be 1/24,

I hope that helps!

Step-by-step explanation:

Answer:

angle y = 22.7 degrees

angle x = 157.3 degrees

Step-by-step explanation:

Angle x + angle y = 180  because they are supplementary.

Angle x = angle y + 134.6 degrees

2y + 134.6 = 180

2y = 45.4

y = 22.7 degrees

x = 157.3 degrees

Answer:

x-10

Step-by-step explanation:

you have to do what is in the parenthesis first. Do distributive property to

-(x-8)

-(x)-(-8)= -x+8

now you have 5-(3-x+8)

Do distributive property again

5-3+x-8

x-8+2

x-10

hope this helps ~D~

Answer:

your answer will be X−6

Step-by-step explanation:

hope it helps

have a nice day/night ^_^

Answer:

In an isosceles right triangle, the equal sides make the right angle. ... Therefore each of those acute angles is 45°.

Step-by-step explanation:

Answer:

2 of the angles must be the same measure and one of the angle must be different from them.

Step-by-step explanation:

if 2 angles are 50 then one of them must be 80

The answer is 59/60.

and in decimal form it would be, 0.983333

Step-by-step explanation:

y=5x+12 ....... eqn 1

3y+4X=150.....eqn 2

sub eqn 1 into 2

3(5x+12) + 4X = 150

15X+36 +4X=150

19X = 150-36

19X= 114

X= 6

Answer:

4:29

Step-by-step explanation:

Answer:

Non-proportional

Step-by-step explanation:

I belive non promotional